Add --source winget to all remaining winget install and uninstall calls

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

powershell/Winget-Remove-BuiltInApps.ps1

@@ -90,7 +90,7 @@ $Packages = @(
 foreach ($Package in $Packages) {
     Write-Host "Uninstalling: $Package" -ForegroundColor Cyan
 
-    winget uninstall --name "$Package" --silent --accept-source-agreements --nowarn
+    winget uninstall --name "$Package" --source winget --silent --accept-source-agreements --nowarn
 
     if ($LASTEXITCODE -eq 0) {
         Write-Host "$Package successfully uninstalled" -ForegroundColor Green

powershell/libres-softwares-install.ps1

@@ -429,7 +429,7 @@ foreach ($logiciel in $logicielsAInstaller) {
             $reussites++
             $resultats += @{Logiciel = $logiciel.Nom; Statut = "Succes"}
         } else {
-            $process = Start-Process -FilePath "winget" -ArgumentList "install", "--id", $logiciel.ID, "--silent", "--accept-source-agreements", "--accept-package-agreements" -NoNewWindow -Wait -PassThru
+            $process = Start-Process -FilePath "winget" -ArgumentList "install", "--id", $logiciel.ID, "--source", "winget", "--silent", "--accept-source-agreements", "--accept-package-agreements" -NoNewWindow -Wait -PassThru
 
             if ($process.ExitCode -eq 0) {
                 Write-Host "OK $($logiciel.Nom) installe avec succes" -ForegroundColor Green